Yeah, it's a waste to only wear a cosplay once. I have so many characters I want to cosplay too. What I do is to put together 2 or 3 new cosplays a year, and for a 3-day event I'll take 2 re-wears and my latest new cosplay. You can mix up the re-wears too to include ones that you haven't worn for ages. The more events you wear a cosplay to the more chances you get to have fun and do photoshoots with cosplayers from the same series ^^

yeap got the brightly coloured tip on it and everything as the rules state :

Realistic replica guns such as accurate plastic pistols or rifles, airsoft guns, BB guns are allowed
with a brightly coloured tip on the end of the muzzle of the gun OR if they have significantly brightly
coloured portion. This does not have to be permanently fixed to the item and can be removed for
photographs if fitted back in place afterwards.
Please do not draw replica handguns suddenly or in front of children who may be excitable or
easily scared. Threatening or intimidating behaviour with realistic replica guns is also forbidden.
Note that some venues are close to airports; keep such items packed in bags when not at the
venue including for photo shoots or travelling to hotels or restaurants.